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Title: Accidental supersymmetric dark matter and baryogenesis

Abstract

We show that ''accidental'' supersymmetry is a beyond-the-Standard Model framework that naturally accommodates a thermal relic dark matter candidate and successful electroweak baryogenesis, including the needed strongly first-order character of the electroweak phase transition. We study the phenomenology of this setup from the standpoint of both dark matter and baryogenesis. For energies around the electroweak phase transition temperature, the low-energy effective theory is similar to the MSSM with light super-partners of the third-generation quarks and of the Higgs and gauge bosons. We calculate the dark matter relic abundance and the baryon asymmetry across the accidental supersymmetry parameter space, including resonant and non-resonant CP-violating sources. We find that there are regions of parameter space producing both the observed value of the baryon asymmetry and a dark matter candidate with the correct relic density and conforming to present-day constraints from dark matter searches. This scenario makes sharp predictions for the particle spectrum, predicting a lightest neutralino mass between 200 and 500 GeV, with all charginos and neutralinos within less than a factor 2 of the lightest neutralino mass and the heavy Higgs sector within 20–25% of that mass, making it an interesting target for collider searches. In addition, we demonstrate that successfulmore » accidental supersymmetric dark matter and baryogenesis will be conclusively tested with improvements smaller than one order of magnitude to the current performance of electron electric dipole moment searches and of direct dark matter searches, as well as with IceCube plus Deep Core neutrino telescope data.« less

Authors:
;
Publication Date:
OSTI Identifier:
22279619
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2013; Journal Issue: 01; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTROPHYSICS; ASYMMETRY; BARYONS; COSMOLOGY; CP INVARIANCE; ELECTRIC DIPOLE MOMENTS; ELECTRONS; ENERGY SPECTRA; GEV RANGE; HIGGS BOSONS; HIGGS MODEL; NEUTRALINOS; NEUTRINOS; NONLUMINOUS MATTER; PHASE TRANSFORMATIONS; QUARKS; REST MASS; SPACE; STANDARD MODEL; SUPERSYMMETRY

Citation Formats

Kozaczuk, Jonathan, Profumo, Stefano, and Wainwright, Carroll L., E-mail: jkozaczu@ucsc.edu, E-mail: profumo@ucsc.edu, E-mail: cwainwri@ucsc.edu. Accidental supersymmetric dark matter and baryogenesis. United States: N. p., 2013. Web. doi:10.1088/1475-7516/2013/01/027.
Kozaczuk, Jonathan, Profumo, Stefano, & Wainwright, Carroll L., E-mail: jkozaczu@ucsc.edu, E-mail: profumo@ucsc.edu, E-mail: cwainwri@ucsc.edu. Accidental supersymmetric dark matter and baryogenesis. United States. https://doi.org/10.1088/1475-7516/2013/01/027
Kozaczuk, Jonathan, Profumo, Stefano, and Wainwright, Carroll L., E-mail: jkozaczu@ucsc.edu, E-mail: profumo@ucsc.edu, E-mail: cwainwri@ucsc.edu. Tue . "Accidental supersymmetric dark matter and baryogenesis". United States. https://doi.org/10.1088/1475-7516/2013/01/027.
@article{osti_22279619,
title = {Accidental supersymmetric dark matter and baryogenesis},
author = {Kozaczuk, Jonathan and Profumo, Stefano and Wainwright, Carroll L., E-mail: jkozaczu@ucsc.edu, E-mail: profumo@ucsc.edu, E-mail: cwainwri@ucsc.edu},
abstractNote = {We show that ''accidental'' supersymmetry is a beyond-the-Standard Model framework that naturally accommodates a thermal relic dark matter candidate and successful electroweak baryogenesis, including the needed strongly first-order character of the electroweak phase transition. We study the phenomenology of this setup from the standpoint of both dark matter and baryogenesis. For energies around the electroweak phase transition temperature, the low-energy effective theory is similar to the MSSM with light super-partners of the third-generation quarks and of the Higgs and gauge bosons. We calculate the dark matter relic abundance and the baryon asymmetry across the accidental supersymmetry parameter space, including resonant and non-resonant CP-violating sources. We find that there are regions of parameter space producing both the observed value of the baryon asymmetry and a dark matter candidate with the correct relic density and conforming to present-day constraints from dark matter searches. This scenario makes sharp predictions for the particle spectrum, predicting a lightest neutralino mass between 200 and 500 GeV, with all charginos and neutralinos within less than a factor 2 of the lightest neutralino mass and the heavy Higgs sector within 20–25% of that mass, making it an interesting target for collider searches. In addition, we demonstrate that successful accidental supersymmetric dark matter and baryogenesis will be conclusively tested with improvements smaller than one order of magnitude to the current performance of electron electric dipole moment searches and of direct dark matter searches, as well as with IceCube plus Deep Core neutrino telescope data.},
doi = {10.1088/1475-7516/2013/01/027},
url = {https://www.osti.gov/biblio/22279619}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 01,
volume = 2013,
place = {United States},
year = {2013},
month = {1}
}